com.scudata.dm.op.Push Maven / Gradle / Ivy

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SPL(Structured Process Language) A programming language specially for structured data computing.

There is a newer version: 20240823

package com.scudata.dm.op;

import com.scudata.dm.Context;
import com.scudata.dm.Sequence;
import com.scudata.expression.Function;

/**
 * ?α??ܵ??ĸ??ӵ????͵?ǰ???ݵ?ָ???ܵ????㴦????
 * cs.push(ch)
 * @author RunQian
 *
 */
public class Push extends Operation {
	private Channel channel;

	public Push(Channel channel) {
		this(null, channel);
	}
	
	public Push(Function function, Channel channel) {
		super(function);
		this.channel = channel;
	}
	
	/**
	 * ????ȫ?????????ʱ???ã?group??????Ҫ֪?????ݽ?????ȷ?????һ???????
	 * @param ctx ??????????
	 * @return ???ӵĲ????????????
	 */
	public Sequence finish(Context ctx) {
		channel.finish(ctx);
		return null;
	}
	
	/**
	 * ???????????ڶ??̼߳??㣬??Ϊ????ʽ???ܶ??̼߳???
	 * @param ctx ??????????
	 * @return Operation
	 */
	public Operation duplicate(Context ctx) {
		return new Push(function, channel);
	}
	
	/**
	 * ?????α??ܵ???ǰ???͵?????
	 * @param seq ????
	 * @param ctx ??????????
	 * @return
	 */
	public Sequence process(Sequence seq, Context ctx) {
		channel.push(seq, ctx);
		return seq;
	}
}